I have trouble getting into our shower. I'm handicapped. The 4" step is too high for me to negotiate. I would like to get a new shower that I don't have to lift my leg to step into. The problem is that the present shower fits into an area that is only 40" x 40". When I look for accessible showers it seems like they are mostly 40"x60". The bathroom is too small for such a shower. If you know of any manufacturers that make compact showers that would fit this space I would sure like to know where I could get one. Thanks.